5681881305 has 12 divisors (see below), whose sum is σ = 9848594340. Its totient is φ = 3030336672.

The previous prime is 5681881301. The next prime is 5681881313. The reversal of 5681881305 is 5031881865.

5681881305 is a `hidden beast` number, since 568 + 1 + 8 + 81 + 3 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1265082624 + 4416798681 = 35568^2 + 66459^2 .

It is not a de Polignac number, because 5681881305 - 2² = 5681881301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 126264029 = 5681881305 / (5 + 6 + 8 + 1 + 8 + 8 + 1 + 3 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (5681881301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63131970 + ... + 63132059.

It is an arithmetic number, because the mean of its divisors is an integer number (820716195).

Almost surely, 2^5681881305 is an apocalyptic number.

It is an amenable number.

5681881305 is a deficient number, since it is larger than the sum of its proper divisors (4166713035).

5681881305 is a wasteful number, since it uses less digits than its factorization.

5681881305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126264040 (or 126264037 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 5681881305 is about 75378.2548550973. The cubic root of 5681881305 is about 1784.4212468264.

The spelling of 5681881305 in words is "five billion, six hundred eighty-one million, eight hundred eighty-one thousand, three hundred five".